The price of a certain combo meal at different franchises of a national fast food company varies from $5.00 to $17.34and has a known standard deviation of $2.12. A sample of 27 students in an online course that includes studentsacross the country stated that their average price is $6.25. The students have also stated that they are generallyunwilling to pay more than $7.00 for this meal. Formulate and conduct a hypothesis test to determine if you canconclude that the population mean is less than $7,00. Use a level of significance of 0.05.Is there sufficient evidence at the 0.05 level of significance that the population mean is less than $7.00?Determine the null hypothesis, Ho, and the alternative hypothesis, H₁Ho198H₁.(Type integers or decimals. Do not round.)KInTHE

Givenstandard deviation(σ)=2.12Mean(x)=6.25sample size(n)=27significance level(α)=0.05

Answered: The price of a certain combo meal at…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a survey, 13 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $50 and standard deviation of $9. Find the margin of error at a 90% confidence level.
In a survey, 21 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $41 and standard deviation of $6. Find the margin of error at a 90% confidence level.
The average starting salary of students who graduated from colleges of Business in 2009 was $48,800. A sample of 100 graduates of 2010 showed an average starting salary of $50,000. Assume the standard deviation of the population is known to be $7000. We want to determine whether or not there has been a significant increase in the starting salaries. a. State the null and alternative hypotheses to be tested. b. Compute the test statistic. c. The null hypothesis is to be tested at the 5% level of significance. Determine the critical value for this test. d. What do you conclude from the test? e. What does the test result mean in the context of this problem?
The admitting office at Sisters of Mercy Hospital wants to be able to inform patients of the average level of expenses they can expect per day. Historically, the average has been approximately $1190. The office would like to know if there is evidence of a decrease in the average daily billing. Seventy-two randomly selected patients have an average daily charge of $1164 with a standard deviation of $276. Conduct a hypothesis test to determine whether there is evidence that average Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below.
Answer quickly please. Need answer ASAP. A study was made to determine if the subject matter in a physics course is better understood when a lab constitutes part of the course. Students were randomly selected to participate in either a 3-semester-hour course without labs or a 4-semester-hour course with labs. In the section with labs, 17 students made an average grade of 85 with a standard deviation of 4.7, and in the section without labs, 17 students made an average grade of 79 with a standard deviation of 6.1. Construct 90% confidence interval for the difference of the mean grades between the two physics courses. Based on your interval, would you say that the laboratory course increases the average grade? Assume the populations to be approximately normally distributed.
Decide if the given claim represents the null or alternative hypothesis. a. A governor claimed that more than 76% of residents welcomed the stat-at-home order. The claim would be the alternative hypothesis. b. Hospitals claimed that they did not have the PPE required to keep their personnel safe. This could not be used as a null or alternative hypothesis. c. A Capitol High School spokesperson said that the SAT standard deviation was 22.5 points. The claim would be the alternative hypothesis. d. The senator claimed that unemployment in his state was greater than 18%. The claim would be the alternative hypothesis. e. She thought that on average she spent fewer than 12 hours a week on homework. The claim would be the null hypothesis.
Community college instructors' salaries in one state are very low, so low that educators in that state regularly complain about their compensation. The national mean is $57,636$⁢57,636, but instructors from Mississippi claim that the mean in their state is significantly lower. They survey a simple random sample of 3737 colleges in the state and calculate a mean salary of $52,534$⁢52,534 with a standard deviation of $15,791$⁢15,791. Test the instructors' claim at the 0.050.05 level of significance. Step 3 of 3 : Draw a conclusion and interpret the decision.
Assume a media agency reports that it takes television streaming service subscribers in the U.S. an average of 6.60 days to watch the entire first season of a television series, with a standard deviation of 4.21 days. Scarlett is an analyst for an online television and movie streaming service company that targets to the 18-50 age bracket. She wants to determine if her company's customers exhibit shorter viewing rates for their series offerings. Scarlett plans to conduct a one-sample ?-z-test, with significance level of ?=0.05α=0.05, to test the null hypothesis, ?0:?=6.60 daysH0:μ=6.60 days, against the alternative hypothesis, ?1:?<6.60 days.H1:μ<6.60 days. The variable ?μ is the mean amount of time, in days, that it takes for customers to watch the first season of a television series. Scarlett selects a simple random sample of 740 customers who watched the first season of a television series from the company database of over 25,000 customers that qualified. She compiles the…

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